Britney Spears is proving that couples who sweat together stay together. The 39-year-old pop princess, fresh from revealing that yes, she does get "dizzy" with those skimpy spinning home dance sessions, has been busy helping out 27-year-old boyfriend Sam Asghari with his workouts. On Tuesday, the Iranian personal trainer updated his Instagram stories straight from a workout room, and he was shouting out "Toxic" singer Britney for keeping him going. Fans saw Sam's beyond-ripped body pumping iron, seemingly, with Britney's help. Check it out below.